TCI Transmissions are ideal for vehicles powered by engines producing up to 750 horsepower with non-superchargers. Equipped with a TCI manual/automatic valve body, the StreetFighter Transmission allows you to shift manually into each gear or to remain fully automatic by placing it in Drive. The valve body, however, permits downshifting if the engine speed is lowered to the low gear operating range. To function properly, all throttle linkage, vacuum lines, and kickdown components must be connected. TCI's high standards ensure that you can expect dependable and long-term performance.